This is a variant on an old assembly and 'C' trick that seems to work under Perl (at least, 5.005_03).

my $x = 123;
my $y = 666; 

$x ^= $y ^= $x ^= $y;

[download]

It swaps the two values without using an intermediate variable. Now I know that can be done under Perl other ways, but it might make a cool little hack for a JAPH-type person (which is *very* not-me).

For a collection of cute C tricks that someone could port to Perl, see Steve's 'Cute Code' Collection

--Chris

e-mail jcwren

In reply to Potentially useful code fragment for you JAPHer's by jcwren

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